/Engine/Plugins/Experimental/ChaosEditor/Source/FractureEditor/Public/FractureTool.h
OnPropertyModifiedDirectlyByTool is broadcast when a property is changed internally by the tool. This allows any external display of such properties to update. In a DetailsView, for instance, it refreshes certain cached states such as edit condition states for other properties.
typedef TMulticastDelegate_OneParam< void, [UObject](API\Runtime\CoreUObject\UObject\UObject) * > OnToolPropertyInternallyModified